Process of producing piperylene.



UNITED s rA'rs LUCAS PETRON KYRIAKIDES AND RICHARD TBLAIR EARLE, 013 BOSTON, MASSAGHU- SETTS, ASSIGNORS TO HOOD RUBBER COMPANY, OF BOSTON, MASSACHUSETTS, A

CORPORATION OF MASSACHUSETTS.

PROCESS OF raonucme PIPERYLENE.

No Drawing.

To all whom it may concern:

which is a valuable hydrocarbon used for the production of rubber-likesubstances and terpenes. 1

The new process consists in passing the vapors of amylene oxid of the formula:

CH2 CH -CHz-CH2 CH3 over dehydrating catalytics such as alumi'- mun silicate at' temperatures ranging from l00"500 C. and pressures less than 60 millimeters of mercury. vThe reaction consists of the splitting off of water according to the reaction:

In order to illustrate the process more fully, the following example is given. The

amylene oxid is distilled slowly over aluminum silicate, either powdered or in briquet form, the pressure being reduced to one Specification of Letters Patent.

Application filed November 11, 1911. Serial No. 659,822.

Patented July 23, 1912.

millimeter of mercury by a vacuum pump,

and the aluminum silicate being kept at a temperature of 450 C. The products of the reaction are condensed in suitable receivers by means of refrigerating'agents and purified by distillation. The piperylene may be used in the form so obtained. The yield is about 70% of the theory.

1. The process for producing piperylene, which consists in passing the vapors of amylene oXid:

' CH2 CH-CHz-CHz-CH over heated dehydrating catalytics at tem-' peratures from 400-500 0., pressures less than 60 millimeters of mer cury.

which consists in passing the vapors of amylene oxldz' 4 cs2 oH-cm-cm-crn over heated aluminum silicate at temperatures from 400-500 (1., i noacuopat pressures less than 60 millimeters of mercury.

In testimony whereof, we aflix our signain vacuo, at,

2. The process for producing piperylene. 

